package com.finch.nio2;

import org.junit.Test;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;

/**
 * @author Levi Wang
 * @create 2021-07-14 23:24
 *
 * 阻塞方式
 *
 */

public class TestBlockingNIO2 {

    //客户端
    @Test
    public void client() throws IOException {
        SocketChannel sChannel = SocketChannel.open(new InetSocketAddress("127.0.0.1", 9898));
        FileChannel inChannel = FileChannel.open(Paths.get("1.jpg"), StandardOpenOption.READ);
        ByteBuffer buf = ByteBuffer.allocate(1024);
        while (inChannel.read(buf) != -1){
            buf.flip();
            sChannel.write(buf);
            buf.clear();
        }

        sChannel.shutdownOutput();

        //接收服务端的反馈
        int len = 0;
        while (sChannel.read(buf) != -1){
            buf.flip();
            System.out.println(new String(buf.array(),0, len));
            buf.clear();
        }

        inChannel.close();
        sChannel.close();

    }


    //服务端
    @Test
    public void server() throws IOException {
        ServerSocketChannel ssChannel = ServerSocketChannel.open();
        FileChannel outChannel = FileChannel.open(Paths.get("2.jpg"), StandardOpenOption.WRITE, StandardOpenOption.CREATE);
        ssChannel.bind(new InetSocketAddress(9898));
        SocketChannel sChannel = ssChannel.accept();
        ByteBuffer buf = ByteBuffer.allocate(1024);
        while (sChannel.read(buf) != -1) {
            buf.flip();
            outChannel.write(buf);
            buf.clear();
        }

        //发送反馈给客户端
        buf.put("服务端接收数据成功".getBytes());
        buf.flip();
        sChannel.write(buf);

        ssChannel.close();
        sChannel.close();
        outChannel.close();
    }



}















